The U.S. refused to sign onto a statement with other G7 countries to commit to the implementation of the Paris climate agreement, which President Donald Trump promised to withdraw from on the campaign trail.

Secretary of Energy Rick Perry said the U.S. “is in the process of reviewing many of its policies and reserves its position on this issue, which will be communicated at a future date,” Italy’s industry and energy minister Carlo Calenda said in a statement.

Calenda said other G7 members “reaffirmed their commitment towards the implementation of the Paris Agreement to effectively limit the increase in global temperature well below 2°C above pre-industrial level.”

The Trump administration would not sign onto a statement mentioning Paris, since the president is still deciding whether or not to keep his campaign pledge. Perry also wanted the G7 to include support for coal and natural gas in its statement.

“Therefore, we believe it is wise for countries to use and pursue highly efficient energy resources,” Perry said in a statement after his meeting in Rome with energy ministers from Canada, France, Germany, Italy, Japan, the UK and the European Union.